The suspect in this shocking case doesn't appear to have had a long police career. He joined in September 2018, first in a response team in Bromley, and then was seconded to these highly specialist protection duties. It's surprising that that space of time to learn the ethos of the force and for all the specialist training to be mentally strong and to handle arms ( I presume he was an armed officer), unless, of course, his earlier career was something to do with protection and surveillance and that could explain, maybe, why they wanted to recruit him.
. It seems odd that he has gone from being a rooky to doing a job which potentially might involve dealing with highly-organised and high-danger attacks and mentally high-stress.
I am thinking that this is significant. I find it surprising that individuals are recruited to such roles aged 45, but more pertinent to me is that he isn't steeped in police force culture and ethics and hasn't had that much time to integrate the training and all the counselling they get with his own internal regulation, that we all use to operate. I don't in any way think that anything about being in the police force shaped his behaviour, albeit, it might emerge that there have been errors in the force's investigation of the earlier sex incident which prevented him being identified as a risk to women earlier on.
There is so little information, as to be expected in a murder case, but I don't feel I that I shouldn't trust the police because of this appalling crime. There are sadly very dangerous murderous people living in our society, mercifully few of them, and the police generally do a good job at protecting us and apprehending these rogue individuals. This suspect was certainly identified, somehow, relatively speedily.